I just updated the Node.js on my Ghosties VPS to version 14.16.0 and thereafter all of my sites were 503 Unavailable and were failing on ghost start.
Here is the message I received after running the ghost start command:
Once I ran the below command, everything worked.
ghost update --force
ghost update 3 --force (if the site is running Ghost v3 and I don’t want to update it to v4)
I had to run this for each individual instance of Ghost.
Just a lesson learned. Thought I’d share.